The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 24, 1977
Filed:
Aug. 22, 1975
Applicant:
Inventors:
Max Ruf, Obereisesheim, DT;
Johannes Steinwart, Bad Friedrichshall II, DT;
Assignees:
Audi NSU Auto Union Aktiengesellschaft, Neckarsulm, DT;
Wankel GmbH, Lindau, Bodensee, DT;
Primary Examiner:
Int. Cl.
CPC ...
B22D / ; C21D / ; F01C / ;
U.S. Cl.
CPC ...
148-3 ; 7513 / ; 148 35 ; 148138 ; 148141 ; 418178 ;
Abstract
An interior seal for rotary piston engines in the form of a cast iron scraper ring is arranged for axial movement in an annular groove in one face of the piston; and an annular scraping edge of the seal slides along the interior surface of the neighboring end wall of the housing.